Processing of scientific data from the E.S.A. astrometry satellite HIPPARCOS / Fondamental Astronomy by Space Techniques consortium Second thinkshop held in Marseille, France, January 21-25, 1985 ; Organizing committee : P.L.Bernacca, W.N. Brouw, W.Fricke[et al.] ; Host Institutes : Centre International de rencontres mathématiques and Laboratoire d'astronomie spatiale Marseille ; [edited by J. Kovalevsky] / [Grasse] : [CERGA, Centre d'études et de recherches géodynamiques et astronomiques] , [pas avant 1985]